单项选择题

Texas and Louisiana ______ the nation in the production of sulfur and are also important salt mining states.

A．lead
B．take
C．contribute
D．offer
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A．beB．goC．hangD．being
A．be
B．go
C．hang
D．being
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A．positionB．cameraC．viewD．sight
A．position
B．camera
C．view
D．sight
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